sms_client using ISDN-Controller

Hi,
some month ago i posted here about my trouble using AVM ISDN-Controller.
here is my question again:

I have a lot of trouble using sms-client with AVM ISDN-Controller, 
using yaps (Yet Another Pager Software) it works really fine but with 
sms-client using the same init-strings i get no connection.

Is anyone else using ISDN-Controller to submit SMS? Could i get the sms_modem?

Thanks for your help

Michael


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